The goal of both the Truman Doctrine and the Marshall Plan was to

win World War II.
maintain good relations with the Soviet Union.
contain the spread of communism.
establish satellite states in Europe.

Contain the spread of communism.

Explanation:

The Marshall Plan´s main goal was to support and prop up the economic recovery of European economies ravaged by the Second World War. In part, it was a response to fears of Soviet encroachment and likely communist expansion in Europe (there were still large Red Army units in Eastern Europe) , and it was believed that poverty and material deprivation may help that outcome come true. The containment doctrine called for the USA to oppose Soviet expansionism in Europe and around the world by all means available.

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